Hello,
I have one general question concerning the FPGA supported configuration mode. I am using Xilinx ISE iMpact to program Spartan-3. I use the JTAG Cable-IV to download the bitstream to the Spartan-3. Meanwhile I set up the configuration jumper on board to JTAG mode (i.e. M0,M1,M2=0,1,0). That works fine. But if I set up the jumper to MASTER-SERIAL (i.e. M0,M1,M2=1,1,1) mode, I can still download the bitstream to the Spartan-3 via JTAG cable. I expected that I can download the bitstream via JTAG cable only under JTAG mode jumper set on board. Does the jumper on board have nothing to do with the iMpact "software" based configuration mode set?
Thanks in advance for your explanation.
Chao.